[magneticnorth]

Captchas are usually used to separate humans and bots, typically with something a human can solve but a bot cannot. A bot would have no trouble at all with this game.

[KomoD]

A bot will have no problem with the current captchas either. They're trivial to solve.

[docheinestages]

I think humans don't behave the same as bots when playing this game.

[zaik]

I think it will be easy for a bot to behave in a way that is indistinguishable from some human you don't want to exclude.